Hi - I have gone round my house and bled all radiators recently and all are now hot apart from one. It was working last year so am thinking the thermostatic valve has gone wrong. If that's likely, any advice on how I can fix it, or replace it? Thanks Andy
unscrew the trv head, then use pliers to pull pin up. if stubborn, lubricate with wd40. the pin is stuck in the closed position.